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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22
Bolsters are oversize
Choose the pilot to fit the shank diameter of your pivot pin
Package of 10
Red plastic handles
Heat Treat instructions are included
27/64" Counterbore (For GC121 Bearing) K381 Bolsters are oversizeQuality high speed counterbores used to set your GTC bearing system. Select your counterbore for your chosen size ( outside diameter of the bearing). Then choose the pilot to fit the shank diameter of your pivot pin. Proper cutting depths are 0. 50" for all bearings except GC102 with a cutting depth of 0. 66". 27 64" counterbore for CG121 bearing system. Choose your preferred pilot shank.
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